Some domains (tendancy in corporate world) have decided to implement a mail policy of restricting the number of recipients of a piece of email to a number n (say 20). In doing so they also establish a policy of acknowledging receipt of the message, then turning around and discarding the message without delivering to a single recipient ( firewall listens for and accepts connection, mx points to another server for email, firewall limits to less than 20 recipients) (comments anyone? - what are the rules and are they violating them - since there are no real rules is the common wisdom shifting to accept such techniques - anyone condoning this practise? ). Is anyone aware of how big the problem is? There does not appear to be a way to detect that a domain is doing this, so the assumption is that all of the email has arrived without a problem. Is it feasible to set up a list of domains that are implementing this policy - any volunteers? Typically I have discovered this only through persistent complaint a single subscriber to me, then through their ISP whom on ocassion I have been able to contact. In one instance the postmaster wasn't even aware of the policy until we set up a series of tests for him. Only then did he discover that his ISP had set the policy for anti-spam purposes on the corporate firewall (how nice of them to make assumptions, establish policies and not bother their postmaster with the information). How pervasive a problem is this? What is the common wisdom on such anti-spamm techniques? Does it really solve anything? Any other anti-spamm nasties that will surprise list owners? How ever can we detect that this might be happening? Do other listowners throttle their recipients as a policy or on a case by case basis? __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com